Results 121 to 130 of about 174,035 (261)

Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance

, 2015
We report our observation of two-photon absorption (2PA) in graphene enhanced by the excitonic Fano resonance at the saddle point with femtosecond laser pulses in the spectral range from 1.8 to 2.9 eV (or, from 435 to 700 nm).
Yu Wang (12152), Wang, Yu, Chen, Weiqiang, Weiqiang Chen (164339), Ji, Wei, Wei Ji (15028)   +5 more
core   +1 more source

Plasmonic Enhancement of Fluorescence and Protein Dynamics in Living Mammalian Cells

Advanced Materials, EarlyView.
This study demonstrates plasmonic enhancement of the function of fluorescent voltage sensing proteins (genetically encoded voltage indicators, (GEVIs), QuasAr6) in live mammalian cells. Coupling to plasmonic nanoparticles does not just increase fluorescence, but influences the protein photocycle, creating a hybrid sensor with its response speed to ...
Marco Locarno, Qiangrui Dong, Marco Post, Xin Meng, Cristiano Glessi, Nynke Marije Hettema, Nidas Brandsma, Sebbe Blokhuizen, Alejandro Castañeda Garcia, Srividya Ganapathy, Thieme Schmidt, Lars van Roemburg, Bing Xu, Chun‐Ting Cho, Liedewij Laan, Miao‐Ping Chien, Daan Brinks   +16 more
wiley   +1 more source

Two-Photon Absorption and Saturable Absorption of Mid-IR in Graphene

, 2018
We report on the response of graphene to high intensity mid-IR radiation and show that graphene exhibits saturable absorption and significant two-photon absorption in the spectral region from 1.55 $\mu$m to 3.50 $\mu$m (0.35 eV to 0.80 eV).
David J. Ottaway (14381877), Sze Yun Set (14389728), Shinji Yamashita (2233261), Andrew Malouf (17495730), Ori Henderson-Sapir (14381874)   +4 more
core   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Near‐Infrared Cocrystal Nanofluorophore with Enhanced Two‐Photon Absorption Cross Sections

Advanced Science
The growing demand for organic nanoprobes that combine broadband two‐photon absorption (TPA) with near‐infrared (NIR) optical excitation continues to drive advancements in biological imaging and advanced photonics.
Liangmeng Hao, Ying Ni, Jiawei Huang, Yucheng Wang, Fan Liu, Xu Wang, Lei Kang, Zheshuai Lin, Weigang Zhu   +8 more
doaj   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Strain-enhanced two-photon absorption in twisted bilayer graphene

Scientific Reports
We theoretically investigate the strain-tuned moiré flat bands and two-photon absorption (TPA) in magic-angle (MA) twisted bilayer graphene (TBG). Using a low-energy continuum model for strained TBG and second-order perturbation theory, we demonstrate ...
Lianmeng Yu, Zhaoming Fu, Peizhi Yang, Xiaobo Feng   +3 more
doaj   +1 more source

On the Theory of Interband Two-Photon Absorption of Light in Semiconductors. Accounting Admixtures to the States of the Conduction Band and Valence States, the Rabi Effect

East European Journal of Physics
We present a theoretical study of interband two‐photon (two‐quantum) absorption of polarized light in semiconductors of cubic and tetrahedral symmetry.
Rustam Y. Rasulov, Vokhob Rasulov, Forrukh U. Kasimov, Mardonbek Kh. Nasirov, Islam E. Farmanov   +4 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Two-photon absorption in silicon using real density matrix approach

Two-photon absorption in indirect gap semiconductors is an frequently encountered, but not well-understood phenomenon. To address this, the Real Density Matrix Approach is applied to describe two-photon absorption in silicon through the excitonic ...
David Knez (14384325), Dmitry A. Fishman (1285443), Alessandro Salandrino (10750101), Sergey S. Kharintsev (8267472), David Ziemkiewicz (14359806), Aleksei I. Noskov (18114481), Eric O. Potma (676572), Evan P. Garcia (18114478), Gerard Czajkowski (14416737), Sylwia Zielińska-Raczyńska (14359809)   +9 more
core   +1 more source